A lot of the feedback I received for the Universal Subscription Mechanism was to use the Atom link construct, rather than the RSS link module. As such, I've made the switch official and released a new version of the protocol.
>>>both are thoroughly annoying to the minority of us that actually need to see the XML<<<
I agree. FWIW I intend to provide users with a panel that explains what is happening and gives them the option to add the new feed if it is not already being tracked by the Aggregator. I intend to provide two additional buttons to display the feed source in the user's default browser or in Notepad.